/// <summary>
/// Terminate the shell, if released and in its last scope, by calling the related event handlers.
/// Returns true if the shell context should be disposed consequently to this scope being released.
/// </summary>
private async Task <bool> TerminateShellAsync()
{
// A disabled shell still in use is released by its last scope.
if (ShellContext.Settings.State == TenantState.Disabled)
{
if (Interlocked.CompareExchange(ref ShellContext._refCount, 1, 1) == 1)
{
ShellContext.Release();
}
}
// If the context is still being released, it will be disposed if the ref counter is equal to 0.
// To prevent this while executing the terminating events, the ref counter is not decremented here.
if (ShellContext._released && Interlocked.CompareExchange(ref ShellContext._refCount, 1, 1) == 1)
{
var tenantEvents = _serviceScope.ServiceProvider.GetServices <IModularTenantEvents>();
foreach (var tenantEvent in tenantEvents)
{
await tenantEvent.TerminatingAsync();
}
foreach (var tenantEvent in tenantEvents.Reverse())
{
await tenantEvent.TerminatedAsync();
}
return(true);
}
return(false);
}
